4-14
SACRIFICIAL ANODES
An aluminum alloy anode is mounted
on each jet pump outlet on your boat.
Galvanic corrosion can damage metal
surfaces below the waterline on any
boat, particularly in saltwater. These
“sacrificial” anodes are designed to
erode in these conditions first, before
metal components of your jet pump
outlets are seriously damaged.
ANODE
Inspect the anodes each time the boat
is removed from the water. It is normal
for them to look corroded and rough.
Replace the anodes when they are
approximately one half of their original
size.
• Failure to replace anodes when
necessary can result in perma-
nent damage to the jet pump out-
lets and other metal components
on the boat.
• Never paint the anodes. A coating
of any kind will prevent the anode
from functioning, exposing other
components to galvanic corro-
sion damage.
Replacement Procedure
When the anode has eroded to approx-
imately one-half its original size, it
should be replaced. Ask your dealer for
this service or you can do it yourself if
you have a torque wrench of the proper
type.
1) Unscrew the two mounting bolts that
secure the anode to the jet pump
outlet.
2) Clean the mounting-bolts threads,
then coat them with Loctite
®
242,
available from your Yamaha dealer.
3) Install the new anode. Tighten the
mounting bolts to specification.
Anode Bolt Torque:
50~80 kgf-cm (47~70 inch-pounds)
4
M
AINTENANCE
& C
ARE
